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Tunable magnon-magnon coupling in synthetic antiferromagnets

Sud, A; Zollitsch, CW; Kamimaki, A; Dion, T; Khan, S; Iihama, S; Mizukami, S; (2020) Tunable magnon-magnon coupling in synthetic antiferromagnets. Physical Review B , 102 (10) , Article 100403(R). 10.1103/PhysRevB.102.100403. Green open access

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Abstract

In this work, we study magnon-magnon coupling in synthetic antiferromagnets (SyAFs) using microwave spectroscopy at room temperature. Two distinct spin-wave modes are clearly observed and are hybridized at degeneracy points. We provide a phenomenological model that captures the coupling phenomena and experimentally demonstrate that the coupling strength is controlled by the out-of-plane tilt angle as well as the interlayer exchange field. We numerically show that a spin-current mediated damping in SyAFs plays a role in influencing the coupling strength.

Type: Article
Title: Tunable magnon-magnon coupling in synthetic antiferromagnets
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.102.100403
Publisher version: https://doi.org/10.1103/PhysRevB.102.100403
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Magnetism, Magnetization dynamics, Magnons, Spin current, Spin dynamics, Magnetic multilayers, Multilayer thin films
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10110613
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